Reversible rotary engine.



F. 1). LAMBERT & R". R. RESGH.

REVERSIBLE ROTARY ENGINE.

APPLIOATION FILED MAYB, 1911.

1,029,61 6, Patented June 18, 1912.

9 SHEETBSHEET 1.

F. l Lam 66??? COLUMBIA PLANOGRAPH co.,wAs|-||No'roN. n. c.

F. D. LAMBERT & R. R. RESGH.

REVERSIBLE ROTARY ENGINE. APPLICATION FILED MAY 8, 1911. 1,029,616,Patented June 18,1912.

9 SHBETSSHEET 2.

COLUMBIA PLANOGRAPH CO-,WA$HINGTON. D, c.

F. D. LAMBERT & R. R. RESUH.

REVERSIBLE ROTARY ENGINE.

APPLICATION IILIJD MAY 8, 1911.

Patented June 18, 1912.

9 SHEETS-SEEET 3.

' MUJ W COLUMBIA PLANOGRAPH co., WASHINGTON, n. c.

F. D. LAMBERT & R. R. RESGH.

REVERSIBLE ROTARY ENGINE.

APPLicATIon FILED MAY 8, 1911.

1,029,6 1 6, Patented June 18, 1912.

9 SHEETS-SHEET 44 COLUMBIA PLANOGRAPH co wAsmNfl'ruN. D. c,

' P. I). LAMBERT & R. R. RESOH.

REVERSIBLE ROTARY ENGINE:

APPLICATION FILED MAY 8, 1911. 1,029,616. Patented June 18, 1912.

9 SHEETS-SHEET 5.

gum/whom: J J. Lam 627% RM esc'h 33W M as COLUMBIA PLANOGRAPHCD-IWASHXNCITON. D c.

F.- D. LAMBERT & R. R. RESOH.

REVERSIBLE ROTARY ENGINE.

APPLICATION IILED MAYB, 1911.

1,029,6 1 6, Patented June 18, 1912.

9 SHEETS-SHEET 7.

COLUMBIA PLANOGRAPH c0.,wAsmNGTON, D. c.

F. D. LAMBERT & R. R. RESGH. REVERSIBLE ROTARY ENGINE.

APPLIOATION FILED MAYS, 1911. 1,029.6 1 6, Patented June 18, 1912.

9 SHEETSSHBET 8 77 Z9 80 F'EZ' La??? 56]8 WM 85' v 3.2 MG]? v I E F. D.LAMBERT & R. R. RESGH.

REVERSIBLE ROTARY ENGINE. APELIGATION FILED MAY-8,1911. 1,029,616,Patented June 18, 1912.

9 SHEETS-SHEET 9. v

Gnome/ 5 TINTTED @TATES PATENT @FFTCE.

FLOYD D. LAMBERT AND RALPH R. RESCH, 0F TRINIDAD, COLORADO.

REVERSIBLE ROTARY ENGINE.

To all whom it may concern:

Be it known that we, FLOYD D. LAMBERT and RALPH R. Rnson, citizens ofthe United States, residing at Trinidad, in the county of Las Animas andState of Colorado, have invented certain new and useful Improvements inReversible Rotary Engines, of which the following is a specification.

Our invention relates to engines of the rotary type and particularly tocertain improvements on the rotary engine invented by us and describedin our Patent Serial No. 569,574, filed on the 29th day of June, 1910.

The primary object of this invention is the provision of a rotary enginewhich may be easily reversed, and herein the steam admission valves arecontrolled by a cam of peculiar form rotatable with the rotor, the cambeing so mounted that it may be shifted to adjust-ably control themovement of the valves, the point of cut oil being adjustably controlledby a governor rotatable with the rotor.

A further object of the invention is to so construct the rotor and thecasing that steam shall not escape and that the friction between therotor and casing may be reduced to a minimum.

A further object is to provide means actuated by one lever whereby theexhaust valves and the steam admission valves may be reversed, andwhereby the abutments may be lifted out of engagement with the rotorwhen desired,

A. further object is to improve upon the rotary valves illustrated inour prior application, above referred to, by so constructing the valvesthat the steam passes around the valves instead of going through them.

Other objects will appear in the course of the following description.

In general terms, our invention includes a substantially cylindricalrotor casing in which is mounted a rotor, the rotor having a pluralityof radially arranged blades fixedly mounted upon the rotor and engagingwith the inner circumference of the rotor casing. Mounted in the rotorcasing are a plurality ofradially shiftable abutments, corresponding innumber to the number of blades on the rotor. Means are provided wherebyas a blade approaches an abutment, the abutment is automatically shiftedout of the way of the blade in order to permit it to pass and return toits engagement with the rotor after the passage of the blade. On

Specification of Letters Patent.

Application filed May 8, 1911.

Patented June 18, 1912. Serial No. 625,833.

each side of each abutment are located admission ports, and valvemechanism is pro vided whereby the steam or other motive fluid isadmitted to one or the other of the admission ports of all the sets ofadmission ports, depending upon the direction in which the rotor istraveling. The rotor casing is also provided with a plurality of exhaustports, also arranged on each side of the abutments, the exhaust portsbeing reversible so that the exhaust port of one set is closed while theother exhaust port of the same set is opened, means being providedwhereby the exhaust ports may be controlled in accordance with themovement of the steam admission valves. The steam admission valves andthe exhaust ports are controlled by a cam mechanism mounted to rotatewith the rotor, as will be later described.

Our invention is illustrated in the accompanying drawings wherein:

Figure 1 is an end elevation of our improved engine. Fig. 2 is a sideelevation thereof looking from the right hand end of Fig. 1. Fig. 3 is avertical section on the line 3-3 of F ig. 2. Fig. 4t is a verticalsection on the line 47-4 of Fig. 3. Fig. 5 is an'end view of the rotorand rotor casing looking from the left hand end of Fig. 3, the adjacentend plate of the rotor casing being removed. Fig. 6 is an end elevationof the rotor and middle portion of the rotor casing, the adjacent endplate being removed and the rotor shaft being shown in section, Fig. 7is an enlarged section on the line 7-7 of Fig. l. Fig. 8 is. a face Viewof the cam for operating the admission valves and a portion of theconnecting rod whereby the valves are actuated. Fig. 8 is a perspectiveview of one of the adjustable cam plates coacting with the cam disk.Fig. 8 is a fragmentary sectional view on the line b-Z) of Fig. 8. Fig.9 is an enlarged fragmentary section through the abutment casing and theabutment. Fig. 9 is a vertical sectional view on the line a-a of Fig. 9.Fig. 9 is a sectional view on the line 6-4) of Fig. 9. Fig. 10 is adetail perspective view of a portion of the valve operating connectingrod and the means whereby the valves are reversed. Fig. 11 is a top viewof the structure shown in Fig. 10, the bell crank lever 76 being insection. Fig. 12 is a fragmentary end elevation of a portion of therotor with the valve operating mechanism con nected thereto, the endplate of the rotor' casing being in section. Fig. 13 is an enlargedsectional detail view of one of the exhaust valves and its casing. Fig.14 is an enlarged detail section of a portion of the rotor casingadjacent to one of the steam inlet p orts showing a packing strip inplace therein, the packing strip being in section. Fig. 15 is aperspective detail view of the abutment and the packing therefor, thepacking being detached from the abutment.

Referring now to Figs. 1, 2, 3, 4 and 7, it will be seen that we providea substantially cylindrical rotor casing 2 which is mounted upon a base.Extending centrally through the rotor casing is a shaft 3 upon which ismounted the rotor 4, this rotor .comprising a hub 5 fixed to the shaft3, the

radially extending web 6 and the rim 7, this rim projecting laterally oneach side beyond the web 6. The outer edges of the annular rim 7 arerecessed as at 8 and 8 Mounted in transversely extending recesses formedupon the rim 7 are the transversely extending blades 9, the blades beingset into these recesses as illustrated in Fig. 4. These blades 9 arelongitudinally recessed as at 11 for the reception of packing strips,this packing being supported upon a bowed spring 11 as illustrated inFig. 7, so that the packing is forced outward against the inner face ofthe rotor casing and into steamtight engagement therewith. The springs11, however, are not so strong as to force the packing into very tightfrictional engagement with the inner face of the rotor casing. Mountedin the recesses 8 and 8 are the annular plates 12, both these platesbeing substantially like each other. It will be noted that the recess 8is somewhat deeper than the recess 8, for a purpose to be hereafterdescribed. The plates 12 are bolted to the rim of the rotor by bolts orscrews 13 which hold the annular plates 12 detachably in place. Thefaces of the plates 12 are also countersunk at intervals for thereception of the heads of screws 14 which pass through the plates 12 andinto engagement with the blades 9, as illustrated in Fig. '7. It will beseen that by removing the screws 13 and 14, the plates may be removedand the blades removed. The plates 12 project beyond the outer faces ofthe blades 9, and these projecting edges of the plates 12 extend intocorresponding annular recesses 15 formed in the opposite ends of therotor casing. In other words, the annular plates 12 project beyond theinner face of the rotor casing and overlap the rotor casing. The ends ofthe rotor casing are also recessed at 16 for the reception of annularplates 17 these plates holding in position the antifriction rollers 18which are disposed within a recess 19 formed in the outer side faces ofthe plates 12. The plates 12 thus bear against the rollers 18 so thatthe frictional engagement between the rotor and the casing thereof isreduced to a minimum. It will be seen that by removing the plates 17 theantifriction rollers 18 may be removed, repaired or replaced, and theparts oiled or otherwise lubricated. By this construct-ion we secure apractically steam-tight engagement between the rotor and the casingsurrounding it, while at the same time reducing the friction of theparts to a minimum.

Furthermore, the parts being constructed as described may be easilydisassembled so that the rotor may be removed or repaired. It will beseen that the plates 17 assist in bolding the rotor in place in properengagement with the rotor casing so that the parts shall not bind uponeach other or tend to get out of proper alinement.

As shown in Fig. 4, the rotor casing 2 is provided at opposite points ofits periphery with the enlarged portions 20, each of the enlargedportions forming a casing for a sliding abutment 21. The abutment 21, asillustrated in Fig. 9, has a width equal to the width of the blades 9between the plates 12, and as shown in Fig. 4 this abut-- ment 21 isnormally forced inward so that its inner edge is in contact with theouter face of the rotor 4. Preferably the edge of the abutment isprovided with a packing strip 180 whereby a steamtight contact issecured between the inner face of the abutment and the outer face of therotor, and also with laterally extending packing strips 135 whereby asteam-tight engagement is secured between the faces of the abutment andthe interior of the casing in which the abutment moves. The detailedconstruction whereby this may be secured will be described later.Attached to the outer ex tremity of each abutment is the plunger rod 24which extends out through a stuffing box 25 formed in the end of theabutment casing. This plunger 24 is connected to means whereby theabutment is automatically shifted out of the way of an approaching bladeand automatically shifted inward against the face of the rotor after theblade has passed. This mechanism will be later described.

On each side of eachof' the abutments 21 are located the steam admissionports 28 and 29, both of these ports 28 and 29 being con nected to acircular valve casing 27. Each valve casing is connected by a supplypipe 30 to a source of steam, the supply pipes as illustrated in Fig. 4both connecting to a common conducting pipe 31 leading from the boilerof the engine.

Located within each of the valve chambers 27 is the rotatable valve 32,illustrated in detail in Fig. 4. Each valve consists of a spool-shapedbody portion, the end flanges diameter by a transverse web 34. Apassageway 35 is thus provided which extends nearly entirely around thevalve.

It will be noted from Fig. i that the valves 32 are placed diametricallyopposite to each other, so that one of the valves is below its abutmentcasing while the other valve is above the adjacent abutment casing."When these valves are turned in one position, they will connect theport 28 with the pipe 30, while when turned in the other position theywill connect the pipe 30 with ,the port 29. When the inlet pipe 30 isconnected to the port 29, the engine will move in the direction of thearrow in Fig. 4, while when it is turned so as to connect the port 28with the pipe 30, the engine will move in a direction reverse to thearrow in Fig. 4.

Formed in the rotor casing 2 are the exhaust valve chambers 36. Thereare a pair of these valve chambers for each abutment and for each pairof admission ports, these valve chambers being located on each side ofthe abutment and beyond the admission ports. Each valve chamber isconnected to the exterior of the casing by a passage 37.

Located within the valve chambers 36 are the exhaust valves 38. Theseexhaust valves each have a transverse passage or port 39 extendingdiametrically through them. Then the valve 38 is turned with its passageperpendicular to the circumference of the rotor 41, communication isestablished between the interior of the rotor casing and the exteriorair. hen the valve is turned so that its passage 39 is approximatelyparallel to the inner face of the rotor casing, then this communicationis cut off. It will be seen from Fig. 4 that one exhaust valve of eachpair of valve chambers is turned so that communication is establishedbetween the interior of the rotor casing and the outside air, while theother valve is turned so that communication is cut off. The two exhaustvalves of each pair of valves are set at right angles to each other sothat a quarter turn will close off one exhaust valve of the pair andopen the other.

By reference to Fig. 4, it will be seen that steam entering the casing 2by means of the ports 29 will act upon the blades of the rotor and turnthe rotor in the direction of the arrow. As the blades near theabutments 21, the abutments will be shifted out of the way by amechanism to be hereafter de scribed so as to permit the blades to pass.Just before the blades reach the abutments they will pass the openexhaust valves 38 and the exhausted vapor behind the blades will passout through the exhaust openings 37. It will be obvious that by properlycontrolling the valves 32, steam may be admitted during the Whole travelof the blade from one abutment to the other, or that it may be cut offat any desired point of travel.

This action is secured by means of the mechanism to be described later.

As a means for actuating the abutments so as to remove them from thepath of the blades as the blades approach the abutments, we provide thefollowing instrumentalities. Mounted upon the end 26 of the abutmentcasing as illustrated in Fig. 9 are the parallel brackets 40, havingbearings at their ends supporting a rock shaft 41 which projects at oneend beyond the brackets. Attached to the rock shaft 41 is an arm 4-2which connects by a link 44: with the rod 24 which actuates theabutment. Also mounted upon the projecting end of the rock shaft a1 isthe arm 43 which is pivotally connected to a link 45. It will be seenfrom Fig. 4. that the arms 43 for actuating the two abutments arereversely set to each other so that a reciprocation of the arms 43 inone direction will act to withdraw both abutments simultaneously fromthe path of movement of the blades, and that a movement of the arms 43in the reverse direction will act simultaneously to return both of theabutments into contact with the outer face of the rotor. The links 45 inturn are pivotally connected to links 46 which pass through a guideopening formed in the end wall of the motor casing. These links 46 areconnected to each other by a connecting rod 47, pivotally engaged by thedepending arm TS of a bell crank lever mounted on a bracket 49. Theother arm of the bell crank lever 49 is provided with a roller 50. Inorder to actuate the bell crank 19 to give a reciprocating movement tothe connecting rod 4-7, we attach to the end of the rotor casing 2 theannular cam plate 51, this plate being held in place by the bolts 13, asillustrated in Fig. 7. Projecting from the outer face of the cam plateare the parallel cam walls 52 and 53. As shown in Fig. 5, these walls 52and 53 are spaced from each other just suiiiciently to accommodate theroller 50. The cam wall 52 at opposite points in its diameter is formedwith the inwardly projecting lugs or protuberances 5st having inclinedends 55, while the cam wall 53 is correspondingly inwardly depressed asat 56 so that a cam track 57 is formed between the walls 52 and 53. Itwill be obvious that a rotation of the cam ring 51 will cause the roller50 to be moved inward and then outward, twice for each rotation of therotor. An inward movement of the roller 50 and the arm 4L9 will ofcourse move the connecting rod l7 in a direction to withdraw theabut-ments from their engagement with the face of the rotor, While theoutward movement of the arm 4L9 will cause the abutments to return totheir original position. Both abutment-s move simultaneously outward andsimultaneously inward.

Each of the valves 32 has projecting therefrom a spindle 58 which passesthrough a bonnet 59 of the valve chamber. Attached to each spindle is aradially extending arm 60 and 60, as shown in Figs. 2 and 6. These armsare connected to each other so that the valves shall operatesimultaneously, the connection being illustrated in Fig. 6. To the valvearm 60 is attached a connecting rod 61, the detailed construction ofwhich is shown in Figs. 8 and 10, this rod 61 extending across the endof the engine and being pivotally connected at 62 with a link 63,connected in turn to one arm 61 of a bell crank lever mounted upon abracket 65. The arm 66 of the bell crank lever is in turn connected by alink 67 to the arm 60 of the other valve. It will be seen, therefore,that the valves will be given a simultaneous vmovement in the samedirection upon a reciprocation of the rod 61.

The means for reciprocating the rod 61 so as to open and close the steamadmission valves is as follows. Mounted above the shaft 3 so as torotate therewith is a rota.- table disk constituting in part a fly wheeland in part a cam, this disk being designated 68. The inner face of thedisk is formed with a circular track 69, the outer wall 70 of this trackforming the periphery of the disk being provided at opposite points inthe diameter of the disk with the inwardly extending rounded lugs 71.Depending from a bracket 72 attached to the adjacent end piece of thecasing is a bell crank lever 73, one arm of which extends horizontallyand is provided with a pin 7 4c carrying upon it the roller 7 5 which isadapted to move in the track 69. The other arm 76 of this bell cranklever extends downward and is pivot ally connected to the connecting rod61. The connection between the depending arm 76 and the rod 61 is suchthat the arm may be adjusted longitudinally along the rod.

I The detailed construction for this purpose is illustrated in Fig. 10.The rod 61 is formed in two sections 61, 61 having telescopic engagementwith each other. For this purpose the section 61 is bifurcated or formedat its extremity with two parallel arms 61 the space between these armsbeing large enough to embrace the extremity of the section 61 of therod. The section 61 upon its side edges is formed with guides 61 inwhich the arms 61 engage and slide. The section 61 is provided withbearing lugs 77 and 78, while the section 61 is provided with bearinglugs 7 7 Passing through these lugs and rotatably mounted therein is thescrew 79. The middle portion of this screw isplain and is rotatablymounted in a lug 8O projecting from a traveler 81 which extends from thearm 76 into the space 82. Mounted upon the screw shaft 79 is a pinion83, and engaging with this pinion is a rack bar 8 1 which is held inengagement with the pinion by means of the yoke 85 pivotally mountedupon the screw shaft and abutting against the bearing lug 78. The rackbar 84: is connected to a link 86 which in turn is connected to a rod 87depending from and pivotally connected to an arm 88 mounted on a rockshaft 89. This rock shaft passes through suitable bearings supportedupon the casing of the engine, as illustrated in Fig. 1, and at its endis provided with an arm 90 (see Fig. 2) which is connected by a link 91to a reversing lever 92 mounted upon a quadrant 93 having two notches94: and 95. The reversing lever is provided with suitable means wherebyit may be engaged with either of the notches 94; or 95 of the quadrantand thus held in any adjusted position.

Upon a movement of the lever 92 in one direction, the rod 87 will bedepressed, depressing the rack 841 which will cause a rotation of thepinion 83 and this in turn will shift the two sections of the connectingrod 61 toward each other or away from each other. The reversingoperation performed by these parts will be later referred to. As the camdisk 68 rotates, one of the lugs 71 will engage the roller 7 5,depressing the arm 7 8 and reciprocating the rod 61 in one direction,thus turning the valves 32 in such position as to admit steam throughone of the ports 28 or 29. The distance between the inner extremity ofthe lug 71 and the inner cam wall 96 is great enough to permit theroller to pass between the lugs 71 and the cam wall. The roller will nowremain down and in contact with the cam wall 96, and

steam will be admitted to the rotor.

In order to move the roller 75 up or outward against the outer wall 70,we provide a pair of shiftable cut-01f plates 97. These plates arearcuate in form and are guided upon the wall 96. The outer faces of theplates are curved concentrically to the inner face of the wall 7 0, andthe ends of these cutofi plates are rounded as at 98. These cutoff camplates 97 project beyond the inner wall 96. The cam plates. 97 are eachcarried upon a bolt 101 which passes through a slot 100 formed throughthe disk 68. It will be seen that there are two slots 100 disposed inopposite portions of the disk 68, and that there are two oppositelydisposed cut-ofif cam plates 97. The bolt-s 101' upon which the camplates 97 are mounted extend through the slots 100 and are connected toopposite ends of a governor lever 102, illustrated in Figs. 6 and 12.This governor lever is formed with a hub 103 at its middle. rotatablymounted upon a hub 104 formed with the disk 68. The hub 103 is held inplace by a locking ring 105, as illustrated in Fig. 12, which in turn isheld in place by a set screw or other suitable means.

Extending outward from the outer face of-the disk 68 are the posts 107upon which are mounted the bell cranks 108. Each of these bell crankshas an arm 109 extending inward toward the shaft 3 and provided at theirinner extremities with the governor weights 110. The other arms 111 ofthe bell cranks 108 are connected by links 112 to the opposite portionsof the lever 102.

Pivotally mounted upon the governor balls 110 are the yokes 118, theopposite ends of the yokes being connected by means of the springs 11 1,these springs acting to hold the balls in the position shown in Fig. 6but permitting the balls to shift outward under centrifugal action. Itwill be obvious now that when the balls are shifted outward undercentrifugal action, the lever 102 will revolve, carrying with it the camplates 97 and shifting these cam plates nearer to the lugs 71, and thatas the speed of the engine increases the cam plates 97 will be forcedstill nearer to the lugs 71, thus cutting off the steam earlier in thecycle. If the engine is gradually decreasing in speed, the cam plates 97will be shifted away from the lugs 71, thus cutting down expansion andincreasing the period during which the live steam will flow into thepiston space. This governor mechanism will thus act to keep the enginerunning steadily at one speed. If the speed of the engine increases,then the amount of steam is cut down and the steam is used moreexpansively. If, on the other hand, the speed tends to decrease for anyreason, then the cut-off will occur later, thus tending to increase thespeed of the engine.

It is to be noted that the governor arranged as shown in Fig. 6 and asdescribed will operate. equally well, whether the rotor is running inone direction or the other. When the engine is running in the directionof the arrow A in Fig. 6, the governor balls will be thrown outward inthe direction of the arrow B. \Vhen, however, the engine is runningreversely to the direction of the arrow A, the balls will fly outward inthe direction of the arrow 0 in Fig. 6. It will be seen that when theengine is running in the direction of the arrow A, Fig. 6, thecam plates97 will'move in one direction toward the lugs 71, and that when thedirection of the engine is reversed, the cam plat-es will move in theother direction toward the lugs 71.

The springs 114 are, supported in the yokes 113 by means of screwthreaded hooks 115 which act as turn buckles to expand or contract thesprings 114. By adjusting these hooks 115, the tension on the springs 111 may be adjusted and thus the governor balls held from movement until acertain predetermined speed has been secured.

The action of the reversing lever 92 and its connections to the rack 84:and the action of this rack upon the rod 61 whereby the valves arereversed is as follows. When the lever is moved in the direction of thearrow in Fig. 2, from the notch 91 to the notch 95, the rod 87 will bedepressed, thus forcing down the rack bar 84 which will act to turn thescrew 79. It will be seen that the threads on the two portions of thescrew 011 each side of the lug 80 are in the same direction. Hence asthe rack bar is depressed, the screw will rotate in one direction andthus act to draw the section 61 toward the lug 80 carried by the arm 76and force the section 61 away from the lug 80 and the arm 76. Byreference to Figs. 4 and 6, it will be seen that a movement toward theleft of the section 61 will cause the arm 60 of the steam admissionvalve on that side to rise, thus turning the steam admission valve onthat side in such position that the port 28 will be opened and the port29 will be closed, while a movement of the section 61 toward the left inFig. 6 will move the valve 32 on that side so as to close the port 29and open the port 28. A reverse movement of the rack bar 84: will causea reverse movement of the valves so that communication between the steampipes 30 and the ports 28 will be closed, while communication will beestablished between the steam pipes 80 and the ports 29.

In the construction shown, it is only necessary to give the screw shaft79 about four revolutions in order to reverse the engine, and thisofcourse is easily accomplished by giving the rack 84 suflicient lengthso that it is in proportion to the diameter of the pinion 83.

It will be seen that as the cam disk 68 revolves, the lugs 71 projectingfrom the rim 70 will alternately contact with the roller 75, thusdepressing the roller. As a lug 71 contacts with the roller 75, theroller will be depressed, thus shifting the connecting rod 61 in onedirection, thus opening the valves 32. These valves will stay open untilthe ends of the cam plates 97 strike the rollers 75, whereupon therollers are forced outward to the position shown in Fig. 8 which closesthe valves 82. The valves remain closed until lugs 71 again strike therollers 75. It will thus be seen that the valves are alternately openedand closed, and that the length of time that the valves remain open forthe admission of steam, in other words, the point of cut-off, isdetermined by the proximity of the end of the cam plate 97 to theadjacent lug 71.

It is to be noted that the governor operates the same when the engine isrunning in one direction as in the other, and that no adjustment of thisgovernor is needed when the engine is reversed.

A detail view of one of the exhaust valves and the exhaust valve casingis illustrated in Fig. 13.

the cutaway face 116 It will be seen that the inner face of the rotorcasing 2 is cut away to form the port 2% and that the valve 38 isapproxlmately cylindrical in form and provided with a transverselyextending passage 39,

"which when the valve is turned registers portion being very slightlyconvex and conforming to the curvature of the inner face of the rotorcasing 2, so that when the valve is turned in the position shown in Fig.13, of the valve will be practically a continuation of the inner face ofthe rotor casing. The face of the valve 38 upon which the passage 39opens is also slightly concave as at 117, for the same purpose. Theexhaust valves are movable through a quarter circle into a positionwherein the passages 39 register with the passage 37 and the port 2*, orinto a position at right angles to the passage 37 and the port 2. Inorder to secure this oscillation of the valves 38, each of the valves isprovided with a spindle 118 which extends out through the valve casingformed in the rotor and has attached thereto the radially projecting arm119, as shown in Figs. 2 and 5. There are four exhaust valves, as beforedescribed, arranged in two pairs, the valves of each pair being arrangedon either side of the abutment casing 20. The valves of each pair arearranged in quartering relation to each other so that one of the exhaustvalves shall be open while the other is closed. The arms 119 of theexhaust valves are connected to each other by links 120, these links inturn being connected to a rocker arm 121 fast on the rock shaft 89. Itwill be remembered that this rock shaft has mounted upon it thereversing arm 90 which is connected by the link 91 to the reversinglever 92. It will be seen that when the reversing lever 92 is shiftedfrom one notch to the other of the quadrant 93, the shaft will berocked, thus reversing the action of the steam admission valves and atthe same time reversing the position of the exhaust valves, so that onevalve of each pair which was before open is now closed and the othervalve which was before closed is in turn open, as is illustrated in Fig.4:. Where necessary or desirable, the links 120 may be formed insections pivoted to each other, the

sections being supported upon a radius arm 122, as illustrated in Fig.2.

Preferably the valve actuating mechanism, the reversing gear actuatingmechanism, the governor and the abutment actuating mechanism areinclosed by end plates 123, as illustrated in Figs. 1 and 3. These endplates are bolted to annular flanges formed upon the rotor casing 2 andentirely house the mechanism for operating the valves and the abutments.

As illustrated in Fig. 2, the end plate 123 is provided with boxes 124kfor the passage of the rods 61, 61 and is also provided with the box 125for the guidance and passage of the rod 87. The shaft 3 passes throughthe center of each end plate, as illustrated in Fig. 3, and each endplate is provided with a suitable stufling box 126 through which theshaft passes. These end plates are formed with handle openings closed bycovers 127. By removing these covers, the mechanism in the interior maybe easily oiled or otherwise attended to. By removing the end platesentirely, the reversing and governing mechanism, and the mechanism forcontrolling the abutments may be easily repaired or replaced. Further,by removing these plates'123, the rings 51 and 12 may be easily removed,thus permitting the removal of the rotor, the replacement of the blades9, or the replacement or repair of packing around the blades. The endplates 123 are also provided with drain cocks 128 whereby oil or watermay be withdrawn from the end of the casing.

Each abutment is provided with packing whereby it may have steam-tightengagement with the walls of the abutment casing, the walls of the rotorcasing and the face of the rotor. To this end the abutment asillustrated in Fig. 15 is longitudinally grooved at its lower end as at129. L0- cated in this groove is the longitudinal packing strip 130 madein two sections, the sections being outwardly forced by means of springs131. These packing strips are downwardly forced by means of springs 132contained in sockets formed in the under face of the abutment. The endsof the abutment are cut away as at 134: (see Fig. 15) for the receptionof end packing strips 135. These packing strips are longitudinallyslotted at their upper ends as at 136 for engagement with pins 137projecting from the cutaway ends of the abutment, while the lower endsof the packing strips135 are longitudinally slotted as at 138 forengagement with pins 139 projecting from the sections of the strips 130.Coil springs 140 are disposed in sockets 14:1 in the ends of the cutawayportions of the abutment and press outwardly against the end strips 135.Each side of the abutment is provided with grooves 142 in which aredisposed the trans versely extending packing strips 143 which are eachmade in two sections and forced laterally by intermediate springs 144,these packing strips in turn being forced outwardly by springs 145placed behind them.

In order to prevent the leakage of steam between the rotor and thecasing around the ring plates 12, we form a circumferential packingrecess 138 (see Fig. 3) which opens upon the side face of the recess 15.Located in this recess 138 is the sectional packing ring 139 (see Fig.14). This packing ring is U-shaped in cross section and is preferablyformed in two angular sections. Each recess 138 communicates by passages140 (see Fig. 14) with the ports 28 and 29 so that steam will pass intothe space hehind each packing ring and force it outward.

What we claim is:

1. In rotary engine, a bladed rotor, a casing therefor, oppositelydisposed abutments mounted in the casing to contact with the face of therotor, a cam driven by the rotor, a connecting rod reciprocated by thecam, and bell crank levers supported on the rotor casing and engagingthe said abutments and said connecting rod whereby the abutments aremoved simultaneously with each other.

2. In a rotary engine, a bladed rotor, a rotor casing, oppositelydisposed sliding abutments mounted in the casing to contact with theface of the rotor, means for shifting the abutments as each blade comesinto proximity thereto, the rotor casing being provided with oppositelydisposed pairs of admission ports, each pair being located on each sideof one of the abutments, a pair of exhaust ports also located on eachside of the abutment but beyond the admission ports, oscillating valvescontrolling the passage of steam through the admission ports, saidvalves being shift-able to move them into coaction with one or the otherof said admission ports, oscillatable valves controlling the passage ofexhaust fluid through the exhaust ports, a rock shaft mounted upon therotor casing, manually actuated means for rocking the said shaft, an armprojecting from the shaft, links connecting all of said exhaust valvesto said arm, means for oscillating the admission valves and meansconnected to said rock shaft for shifting both of said admission valvessimultaneously with the shifting of the exhaust valves to cause eachvalve to coact with one or the other of its corresponding ports.

3. In a rotary engine, a bladed rotor, an inclosing casing, oppositelydisposed slid ing abutments mounted in the casing to contact with theface of the rotor, means for shifting the abutments out-ward as eachblade comes into proximity thereto, spaced fluid, supply ducts locatedon each side of each abutment, diametrically opposed valves coactingwith one or the other of said ducts, a connecting rod operativelyconnected to the valves, means for oscillating the connect ing rod tooscillate the valves and to admit or out off steam through one or theother of the passages, and means for changing the length of theconnecting rod so as to cause the valves to coact with one or the otherof the ducts and thus reverse the engine.

4. In a rotary engine, a bladed rotor, an inclosing casing, a slidingabutment in the casing contacting with the face of the rotor, means forshifting the abutment outward as each blade comes into proximitythereto, the rotor casing being provided with a pair of fluid supplyducts located one on each side of the abutment, an oscillating valve forpermitting or cutting off the passage of steam through either of saidpassages, said valve being rotatably shift-able to coact with one ofsaid passages and cut off the other passage, a cam driven by the rotor,an arm reciprocated by the cam, a connecting rod operatively connectedto said valve to oscillate the same, a sliding connection between thereciprocating member and said rod, and means for shifting the connectingrod relative to the reciprocating member to shift the valve.

5. In a rotary engine, a rotor, a rotor casing, opposed pairs of fluidsupply ducts, oscillating valves, one for each pair of ducts andcontrolling the passage of steam therethrough, said valves beingshiftable to coact with one or the other of the ducts of each pair, aconnecting rod extending between the valves for oscillating the same, areciprocating arm, means operated by the rotor for reciprocating thearm, a screw carried on the arm, said screw engaging the connecting rod,a reversing lever, and means connected to the reversing lever foroperating said screw to reverse the valves.

6. In a rotary engine, a rotor, an inclosing casing, opposed slidingabutments mounted in the casing to contact with the face of the rotor,means for shifting the abutments outward as each blade comes intoproximity thereto, the casing being provided with two pairs of steamadmission ports located one on each side of each abutment, cscillatingcut-off valves coacting with one or the other of each pair of admissionports, arms projecting from the valves, a cam mounted to rotate with therotor, a bell crank lever supported from the rotor casing, one arm ofthe bell crank lever engaging in said cam, a sectional connecting rodoperatively connected at opposite ends to the arms projecting from theadmission valves, a rotatable screw carried upon the depending end ofthe bell crank lever and engaging ears on the opposite sections of theconnecting rod, a valve reversing lever,

a rack bar connected to said lever, and a pinion on the screw with whichsaid rack bar engages whereby the screw may be turned in one or theother direction to shift the connecting rod relative to the bell cranklever and reverse the valves.

7. In a rotary engine, a bladed rotor, an inclosing casing, oppositelydisposed sliding abutments mounted in the casing to contact with theface of the rotor, means for shifting the abut-mients outward as eachblade comes into proximity thereto, the casing being provided withopposed pairs of steam supply ducts, one pair for each of the abutments,the ducts of each pair of ducts being located on opposite sides of thecorresponding abutment, opposed oscillating valves for controlling thepassage of steam through the ducts, each of said valves being shiftableto coact with one or the other of the ducts, a sectional connecting rodoperatively connected at opposite ends to said valves for oscillatingthe same simultaneously, a cam rotating with the rotor, an oscillatingmember operated by the cam and engaging said connecting rod to oscillatethe same, means for shifting the sections of the connecting rod relativeto the oscillating member to reverse the valves, oppositely disposedpairs of exhaust valves located in the casing on each side of each ofthe abutments, the valves of each pair being oppositely disposed to eachother, and means for reversing the position of the exhaust valvessimultaneously with the reversing of the admission valves to reverse theengine.

8. In a rotary engine, a bladed rotor,-an inclosing casing, oppositelydisposed sliding abutments mounted in the casing to contact with theface of the rotor, means for shifting the abutments outward as eachblade comes into proximity thereto, spaced fluid supply ducts located oneach side of each abutment, diametrically opposed valves co-acting withone or the other of said ducts, a connecting rod operatively connectedto the valves, means for reciprocating the connecting rod to oscillatethe valves and to admit or cut ofl steam through one or the other of theducts, a reversing lever, exhaust valves operatively connected to saidreversing lever and means operated by the reversing lever and coactingwith the connecting rod for changing the length of the connecting rod asthe reversing lever is moved in one or the other direction thereby tocause the admission valves to coact with one or the other of the ductsand thus reverse the engine.

9. In a rotary engine, a bladed rotor, an inclosing casing, a slidingabutment in the casing contacting with the face of the rotor, means forshifting the abutment outward as each blade comes into proximitythereto, the rotor casing being provided with opposed pairs of fluidsupply ducts located one on each side of the abutments and with a pairof exhaust ports located on each side of the pair of supply ducts, ashiftable valve for admitting or cutting 0H the passage of steam throughone or the other of said ducts, said valve being rotatably shiftable toco-act with one of saidducts and cut ofi the other, a cam driven by therotor, an arm reciprocated by the earn, a connecting rod operativelyconnected to said valve to re ciprocate the same, a sliding connectionbetween the reciprocating arm and said connecting rod, a reversing leveroperatively connected to the exhaust valves, and connections between thereversing lever and said connecting rod for shifting the connecting rodrelative to the reciprocating member to shift the valve upon a shiftingof the reversing lever.

10.In a rotary engine, a rotor, a casing having an inlet port, an inletvalve mounted in the casing and controlling the inlet port, a bell cranklever, one arm thereof carrying a roller and the other arm beingoperatively connected tothe valve, a cam rotating with the rotor andhaving a cam track in which said roller moves, one wall of the cam trackbeing provided at a predetermined point with an inwardly projectingrounded lug adapted to engage the roller and shift the bell crank leverin one direction, and an arcuate member shiftably mounted upon the camand forming a portion of the other wall of the cam track for forcing thebell crank lever in the opposite direction, said arcuate member beingshiftable toward or from the said lug.

11. In a rotary engine, a rotor, a casing having an inlet port, an inletvalve mounted in the casing and controlling the inlet port, a ca1nrotating with the rotor and having cam track, one wall of the cam trackbeing provided at a predetermined point 'with a projecting lug, a memberoperatively connected to the valve and having a roller disposed in saidcam track, an arcuate member shiftably mounted upon the cam and forminga portion of the other wall of the cam track for forcing the said memberin the opposite direction to the direction in which it is forced by saidlug, said arcuate member being shiftable toward or from said lug.

12. In a rotary engine, a rotor, a casing, an inlet valve controllingthe admission of motive fluid to the casing, a centrifugal governorrotating with the rotor and including oppositely disposed pivotedweights, means operated by the governor for controlling the periodduring which the inlet valve remains open, and springs connecting theweights to each other and tending to prevent the outward movement of theweights under the action of centrifugal force, and means adjusting thetension of the springs.

' 13. In a rotary engine, a rotor, a casing inclosing the rotor, aninlet valve controlling the admission of motive fluid to the casing, adisk rotating with the rotor, a cam track formed upon said disk, saidcam track at one point in its circumference having an inwardly extendingrounded protuberance, a valve operating member engaging said camtrackand adapted to be shifted inward by contact with said protuberance, anarcuate cut-off plate forming a portion of the other wall of said camtrack and shiftable toward or from the protuberance and acting to returnthe valve operating member to its original position, an arm mounted uponthe same axis as the disk but independently removable with relationthereto, a bell crank lever mounted upon the disk to rotate therewith, aconnection between the bell crank lever and the arm, and a governor ballcarried upon the other end of the bell crank lever.

14. In a rotary engine, a rotor, a casing, diametrically opposed inletvalves for controlling the admission of steam to the easing, a shaftupon which the rotor is mounted passing through the casing, a diskcarried upon said shaft, said disk having a cam track upon one facethereof, the wall of said cam track being provided at opposite points inits diameter with rounded protuberances, the opposite wall of the camtrack being increased in width for a distance on each side of theprotuberances, a transversely extending lever rotatably mounted upon theshaft, cut-off cam plates mounted upon the opposite ends of said lever,and coacting with the inner wall of said cam track, said plates beingshiftable with the ends of the lever toward or from the protuberances onthe'outer wall of the cam track, oppositely disposed bell crank leversreversely arranged with relation to each other and mounted upon thedisk, arms connecting the bell crank levers to the first named lever,balls mounted upon the inner ends of the bell crank levers, and springsconnecting the bell crank levers to each other and resisting the outwardmovement of the balls.

15. In a rotary engine, a rotor, a-casing surrounding the rotor, a valvechamber formed in the casing and having an opening communicating withthe interior of the casing, and a rotary valve located in said chamber,said valve being cylindrical and having a diametrically extending portadapted to register with the opening in the valve casing, the face ofthe valve adjacent to one opening of the port being slightly concave,the face of the valve at right angles to the direction of the port beingalso concave, said concavities forming each a continuation of theinterior face of the casing when the valve is turned into one or theother of its positions.

16. In a rotary engine, a slidable abutment, the end face of theabutment being grooved along its middle, a packing strip carded in saidend face and resiliently forced outward, lateral packing strips on theends of the abutment disposed upon the opposite faces of the abutment,resilient means forcing said packing strips outward, and oppositelydisposed transverse packing strips carried upon the ends of the abutmentabove the lateral packing strips, and means for forcing said packingstrips outward.

17. I11 a rotary engine, a rotor, a rotor casing, said casing havingsteam inlet ports, the casing being provided on each side with acircumferential recess opening upon the inner face of the casing, and apacking strip U-shaped in cross section supported in said recess withthe hollow side of the packing strip inward, said packing stripcontacting with the rotor and the recess being connected to the steaminlets to permit steam to enter behind the packing to force it againstthe rotor.

18. In a rotary engine, a rotor, a rotor casing, radially shiftableabutments carried in the rotor casing and contacting with the face ofthe rotor, bell crank levers operatively connected to the abutments, aconnecting rod extending between said bell crank levers and operativelyconnecting the same, a cam rotatable with the rotor and having a camtrack on one face thereof, and a bell crank lever, one arm of whichcarries a roller engaging said cam track, the other arm beingoperatively connected to said connecting rod.

In testimony whereof, we aflix our signatures in presence of twowitnesses.

Gopies of this patent may be obtained for five cents each, by addressingthe Commissioner FLOYD D. LAMBERT. [1,. s] RALPH It. RESCH. [n s]Vvitnesses:

A. M. SANKEY, DELPHA HOUGH.

of Patents Washington, D. G.

